By including a per diem amount in the letter, the parties will not have to execute another payoff letter if the termination date. Depending on your lender, you may have to sign in to an online account, call a helpline, or send a formal letter to start the request process.To get a payoff letter, ask your mortgage lender for an official payoff statement and let them know what the projected closing date is. A payoff letter shows the remaining balance on your mortgage, including fees, interest, etc. Learn more about what a payoff quote is and how to request one. Please provide payoff information for the above referenced mortgage. Also, please provide loan number and per diem interest. A payoff letter shows the remaining balance on your mortgage, including fees, interest, etc. Learn more about what a payoff quote is and how to request one. 5, Request for Funds (RFF), and clarified the Request for Funds. Process.